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参数资料
| 型号： | MAX11101EUB+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 4/19页 |
| 文件大小： | 0K |
| 描述： | IC ADC 14BIT SRL 200KSPS 10UMAX |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 位数： | 14 |
| 采样率（每秒）： | 200k |
| 数据接口： | MICROWIRE?，QSPI?，串行，SPI? |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 444mW |
| 电压电源： | 模拟和数字 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 10-uMAX |
| 包装： | 管件 |
| 输入数目和类型： | 1 个单端，单极 |
Maxim Integrated Products 12
MAX11101
14-Bit, +5V, 200ksps ADC with 10A Shutdown
Output Coding and Transfer Function
The data output from the MAX11101 is binary and Figure 8
depicts the nominal transfer function. Code transitions
occur halfway between successive-integer LSB values
(VREF = 4.096V and 1 LSB = 250FV or 4.096V/16384).
Applications Information
External Reference
The MAX11101 requires an external reference with a volt-
age range between 3.8V and AVDD. Connect the exter-
nal reference directly to REF. Bypass REF to AGND with
a 4.7FF capacitor. When not using a low-ESR bypass
capacitor, use a 0.1FF ceramic capacitor in parallel with
the 4.7FF capacitor. Noise on the reference degrades
conversion accuracy.
The input impedance at REF is 40I for DC currents.
During a conversion, the external reference at REF must
deliver 100FA of DC load current and have an output
impedance of 10I or less.
For optimal performance, buffer the reference through
an op amp and bypass the REF input. Consider the
MAX11101’s equivalent input noise (80FVRMS) when
choosing a reference.
Input Buffer
Most applications require an input buffer amplifier to
achieve 14-bit accuracy. If the input signal is multi-
plexed, switch the input channel immediately after acqui-
sition, rather than near the end of or after a conversion
(Figure 9). This allows the maximum time for the input
buffer amplifier to respond to a large step change in the
input signal. The input amplifier must have a slew rate of
at least 2V/Fs to complete the required output voltage
change before the beginning of the acquisition time.
At the beginning of the acquisition, the internal sampling
capacitor array connects to AIN (the amplifier output),
causing some output disturbance. Ensure that the sampled
voltage has settled before the end of the acquisition time.
Digital Noise
Digital noise can couple to AIN and REF. The conversion
clock (SCLK) and other digital signals active during input
acquisition contribute noise to the conversion result. Noise
signals synchronous with the sampling interval result in
an effective input offset. Asynchronous signals produce
random noise on the input, whose high-frequency compo-
nents may be aliased into the frequency band of interest.
Minimize noise by presenting a low impedance (at the
frequencies contained in the noise signal) at the inputs.
This requires bypassing AIN to AGND, or buffering the
input with an amplifier that has a small-signal bandwidth
of several MHz, or preferably both. AIN has about 4MHz
of bandwidth.
Distortion
Avoid degrading dynamic performance by choosing an
amplifier with distortion much less than the MAX11101’s
total harmonic distortion (THD = -99dB at 1kHz) at
frequencies of interest. If the chosen amplifier has
insufficient common-mode rejection, which results in
degraded THD performance, use the inverting configu-
ration (positive input grounded) to eliminate errors from
this source. Low temperature-coefficient, gain-setting
resistors reduce linearity errors caused by resistance
changes due to self-heating. To reduce linearity errors
due to finite amplifier gain, use amplifier circuits with suf-
ficient loop gain at the frequencies of interest.
DC Accuracy
To improve DC accuracy, choose a buffer with an offset
much less than the MAX11101’s offset (1mV (max) for
+5V supply), or whose offset can be trimmed while main-
taining stability over the required temperature range.
Figure 8. Unipolar Transfer Function, Full Scale (FS) = VREF,
Zero Scale (ZS) = GND
OUTPUT CODE
FULL-SCALE
TRANSITION
11 . . . 111
11 . . . 110
11 . . . 101
00 . . . 011
00 . . . 010
00 . . . 001
00 . . . 000
12
3
0
FS
FS - 3/2 LSB
FS = VREF
INPUT VOLTAGE (LSB)
1LSB = VREF
16384
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX11101EUB+ | 功能描述:模数转换器 - ADC 14-Bit 5V 200ksps w/10uA Shutdown RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| MAX11101EUB+T | 功能描述:模数转换器 - ADC 14-Bit 5V 200ksps w/10uA Shutdown RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| MAX11101EWC | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:14-Bit, +5V, 200ksps ADC with 10μA Shutdown |
| MAX11101EWC+ | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:14-Bit, 5V, 200ksps ADC with 10??A Shutdown |
| MAX11101EWC+T | 功能描述:模数转换器 - ADC 14-Bit 5V 200ksps w/10uA Shutdown RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
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